arch/arm/mach-uniphier/soc-info.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 Socionext Inc.
   4  *   Author: Masahiro Yamada <yamada.masahiro@socionext.com>
   5  */
   6
   7 #include <linux/io.h>
   8 #include <linux/types.h>
   9
  10 #include "sg-regs.h"
  11 #include "soc-info.h"
  12
  13 static unsigned int __uniphier_get_revision_field(unsigned int mask,
  14                                                   unsigned int shift)
  15 {
  16         u32 revision = readl(SG_REVISION);
  17
  18         return (revision >> shift) & mask;
  19 }
  20
  21 unsigned int uniphier_get_soc_id(void)
  22 {
  23         return __uniphier_get_revision_field(0xff, 16);
  24 }
  25
  26 unsigned int uniphier_get_soc_model(void)
  27 {
  28         return __uniphier_get_revision_field(0x7, 8);
  29 }
  30
  31 unsigned int uniphier_get_soc_revision(void)
  32 {
  33         return __uniphier_get_revision_field(0x1f, 0);
  34 }